European Transport / Trasporti Europei (2012) 51/XVII

CONTENTS

Special issue: Operational research issues in transport analysis. A selection of the papers presented at the 41st Annual Conference of the Italian Operational Research Society (AIRO 2010)

Pasquale Carotenuto, Mauro Dell'Orco, Riccardo Rossi, Walter Ukovich
Introduction to the special issue

Vittorio Astarita, Giuseppe Guido, Alessandro Vitale, Vincenzo Giofré
A new microsimulation model for the evaluation of traffic safety performances

Riccardo Rossi, Massimiliano Gastaldi, Federico Carturan, Carlo Pellegrino, Claudio Modena
Planning and management of actions on transportation system to address extraordinary events in post-emergency situations. A multidisciplinary approach

Laura Eboli, Gabriella Mazzulla
Performance indicators for an objective measure of public transport service quality

Leonardo Caggiani, Giuseppe Iannucci, Michele Ottomanelli, Lucia Tangari, Domenico Sassanelli
A fuzzy data meta training system for ranking hub container terminals

Daniela Ambrosino, Anna Sciomachen
Hub locations in urban multimodal networks

Valentina Boschian,Maria Pia Fanti, Giuseppe Iacobellis, Walter Ukovich
Analysis of Impact of ICT Solutions in International Freight Management

Antonio Comi, Paolo Delle Site, Francesco Filippi, Agostino Nuzzolo
Urban Freight Transport Demand Modelling: a State of the Art

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Recent Submissions

Now showing 1 - 4 of 4
  • Publication
    Analysis of Impact of ICT Solutions in International Freight Management
    (2012-03-14)
    Boschian, Valentina
    ;
    Fanti, Maria Pia
    ;
    Iacobellis, Giorgio
    ;
    Ukovich, Walter
    The paper analyses a crucial problem in the international freight management and assesses the application of an innovative solution based on Information and Communication Technology (ICT) tools. In order to improve the customs clearance procedures, the paper analyses the main anomalies and bottlenecks related to international freight management of a case study by modelling the customs clearance activities in the Unified Modelling Language framework. Moreover, some novel ICT based solutions are proposed in order to optimize suited performance indices. The flow of goods and information involved in the case study is simulated in different scenarios in order to highlight the improvements reached by using ICT solutions. The simulation results point out the huge impact of ICT on customs clearance operations.
      1431  7987
  • Publication
    Performance indicators for an objective measure of public transport service quality
    (2012-03-14)
    Eboli, Laura
    ;
    Mazzulla, Gabriella
    The measurement of transit performance represents a very useful tool for ensuring continuous increase of the quality of the delivered transit services, and for allocating resources among competing transit agencies. Transit service quality can be evaluated by subjective measures based on passengers’ perceptions, and objective measures represented by disaggregate performance measures expressed as numerical values, which must be compared with fixed standards or past performances. The proposed research work deals with service quality evaluation based on objective measures; specifically, an extensive overview and an interpretative review of the objective indicators until investigated by researchers are proposed. The final aim of the work is to give a review as comprehensive as possible of the objective indicators, and to provide some suggestions for the selection of the most appropriate indicators for evaluating a transit service aspect.
      4404  17882
  • Publication
    Planning and management of actions on transportation system to address extraordinary events in post-emergency situations. A multidisciplinary approach
    (2012-03-14)
    Rossi, Riccardo
    ;
    Gastaldi, Massimiliano
    ;
    Carturan, Federico
    ;
    Pellegrino, Carlo
    ;
    Modena, Claudio
    The main aim of the work is the design and implementation of an integrated procedure for the identification of optimum action plans (satisfying expenditure constraints) on a road transportation system to minimize the impact produced on it by extraordinary events, in particular earthquakes. The attention is focused particularly on post-emergency situations related to effects on transportation networks caused by extraordinary events; the effects are considered with reference to bridges. Addressing the transition from physical effects to functional effects (relating to mobility) on the single infrastructure element calls for a commitment which has appeared challenging in view of the strongly innovative content involved. The analysis process consists in different steps. At the first step an effort must be made in order to acquire knowledge about the characteristics of the set of infrastructures (bridges) and about a set of possible seismic scenarios. By using fragility curves of bridges, the damage state of the network links (in which bridges are included) can be obtained. By making a series of hypotheses on how a bridge damage state can influence links’ functionality, a set of “damaged” (lower capacity) road network models has been carried out. At the next step of the process, interaction between transportation supply and demand, by way of static or dynamic traffic assignment models, allows to measure the performance of the system, or rather, its overall response to extraordinary events using suitable performance indexes. Then, the network risk curve (probability of the seismic action vs. transportation system performance indexes) is derived. At the end of the process a cost-effective retrofit strategy has been identified. The procedure has been applied to a test network at regional scale in the north-east of Italy.
      1573  1494
  • Publication
    A new microsimulation model for the evaluation of traffic safety performances
    (2012-03-14)
    Astarita, Vittorio
    ;
    Guido, Giuseppe
    ;
    Vitale, Alessandro
    ;
    Giofré, Vincenzo
    Some papers have been recently presented (Cunto and Saccomanno 2007, Cunto and Saccomanno 2008, Saccomanno et al. 2008) on the potential of traffic microsimulation for the analysis of road safety. In particular, studies have confirmed that the reproduction by simulation of user behaviour under different flow and geometry conditions, can identify a potential incident hazard and allow to take appropriate countermeasures at specific points of the road network. The objective of this paper is to assess the validity of this approach; for this reason a microsimulation model and an automatic video detection system have been developed. The microscopic model allows the estimation of road safety performance through a series of indicators (Deceleration Rate to Avoid Crash, Time to Collision, Proportion of Stopping Distance), representing interactions in real time, between different pairs of vehicles belonging to the traffic stream. When these indicators take a certain critical value, a possible accident scenario is identified. The microscopic simulation model is used combined with a new video image traffic detection algorithm to calculate vehicle trajectories. Microscopic traffic flow parameters obtained by video detection are used to calibrate the microsimulation model, and the safety performance indicators obtained by the real vehicles trajectories can be compared with simulated scenarios where safety performance indicators are obtained on the simulated trajectories. Results indicate that the methodology can be useful in the estimation of safety performance indicators and in evaluating traffic control measures.
      2022  4194